Remove Baidu Spider from active users
They currently are the only bots I see that activate Tawk, as they must activate javascript. They are not genuine chat visitors and can be easily identified by their hostname, e.g. baiduspider-180-76-15-160.crawl.baidu.com. They make the sound notification on new users constantly activate.

Hi there dear tawkers,
You do this in Google Webmaster Tools as they do not affect chat engagement.
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Grant Rutherford commented
You have since removed both Baidu and MSN bots from the chat engagement so you have actually done what I requested. Thanks!
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Grant Rutherford commented
Other bots should be checked at the same time
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Grant Rutherford commented
also occurs with MSN bots, their host names are like *.search.msn.com